Source: United States Geological Survey (USGS) Minerals Resources Program
Note: Check source table for details and footnotes
Year | Production | Unit of Measure | % Change |
2003 | 10799 | Thousand metric tons | NA |
2004 | 10198 | Thousand metric tons | -5.57% |
2005 | 9854 | Thousand metric tons | -3.37% |
2006 | 10500 | Thousand metric tons | 6.56% |
2007 | 10550 | Thousand metric tons | 0.48% |
2008 | 9750 | Thousand metric tons | -7.58% |
2009 | 7939 | Thousand metric tons | -18.57% |
2010 | 9358 | Thousand metric tons | 17.87% |
2011 | 12940 | Thousand metric tons | 38.28% |
2012 | 11800 | Thousand metric tons | -8.81% |